[PATCH 04/16] dt-bindings: fpga: machxo2-slave: add lattice,machxo2-slave-i2c compatible

[Johannes Zink <j.zink@xxxxxxxxxxxxxx>]

Lattice MachXO2 FPGAs allow reconfiguration over I2C as well as over
SPI. Add the I2C option to the binding as well.

Signed-off-by: Johannes Zink <j.zink@xxxxxxxxxxxxxx>
---
 .../bindings/fpga/lattice,machxo2-slave.yaml         | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml b/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml
index 03dc134ec7b8..d48d92f27c92 100644
--- a/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml
+++ b/Documentation/devicetree/bindings/fpga/lattice,machxo2-slave.yaml
@@ -21,10 +21,22 @@ allOf:
             const: lattice,machxo2-slave-spi
     then:
       $ref: /schemas/spi/spi-peripheral-props.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: lattice,machxo2-slave-i2c
+    then:
+      properties:
+        reg:
+          description: I2C address
+          maxItems: 1
+
 properties:
   compatible:
     enum:
       - lattice,machxo2-slave-spi
+      - lattice,machxo2-slave-i2c
 
   program-gpios:
     maxItems: 1
-- 
2.30.2